/* =============================================================================
   BUTTONS.CSS — Premium button component system
   Pet Transfer Bodrum — PREMIUM_CONCIERGE
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
}

/* Shimmer effect on hover */
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.12), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
  pointer-events: none;
}
.btn:hover::after { transform: translateX(100%); }

/* ── Variants ──────────────────────────────────────────── */

.btn--primary {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}
.btn--primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn--primary:active { transform: translateY(0); }

.btn--accent {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-accent);
}
.btn--accent:hover {
  background: #B8832E;
  border-color: #B8832E;
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(200,150,62,0.35);
}
.btn--accent:active { transform: translateY(0); }

.btn--outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(27,58,75,0.04);
}

.btn--outline-white {
  background: transparent;
  border-color: rgba(255,255,255,0.3);
  color: white;
}
.btn--outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
}

.btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-text-muted);
}
.btn--ghost:hover {
  color: var(--color-primary);
  background: var(--color-bg-alt);
}

/* ── Sizes ─────────────────────────────────────────────── */
.btn--sm { padding: 10px 20px; font-size: var(--text-sm); border-radius: var(--radius-sm); }
.btn--md { padding: 14px 28px; font-size: var(--text-base); }
.btn--lg { padding: 18px 40px; font-size: var(--text-lg); }
.btn--xl { padding: 22px 52px; font-size: var(--text-xl); border-radius: var(--radius-lg); }
.btn--full { width: 100%; }

/* ── WhatsApp CTA (alias of accent — legacy class name used across pages) ── */
.btn--wa {
  background: #25D366;
  color: white;
  box-shadow: 0 4px 16px rgba(37,211,102,0.3);
}
.btn--wa:hover {
  background: #20BD5A;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37,211,102,0.4);
}

/* ── Phone CTA ─────────────────────────────────────────── */
.btn--phone {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--phone:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-alt);
}
.btn--phone .btn-icon { color: var(--color-accent); }

/* ── Icon handling ─────────────────────────────────────── */
.btn svg,
.btn .btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform var(--duration-fast) var(--ease-out);
}
.btn:hover .btn-icon--arrow { transform: translateX(3px); }

/* ── Loading state ─────────────────────────────────────── */
.btn--loading {
  pointer-events: none;
  opacity: 0.75;
}
.btn--loading::before {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.6s linear infinite;
  flex-shrink: 0;
}
@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* ── Disabled ──────────────────────────────────────────── */
.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.45;
  pointer-events: none;
  cursor: not-allowed;
}